Water is measured by volume, such as in liters, gallons, and acre-feet. An acre-foot as an acre of land (43,560 square feet) covered with one foot of water; this is a volume (that is, it has 3 dimensions) 2. Corn, a common crop in Cache Valley, requires 2 feet of moisture per year for optimal growth, and it requires irrigation in our semi-arid setting. Let's estimate that 15% of irrigation water runs off and another 10% directly evaporates. If a farmer has 500 acres of corn, how much water must they pump to irrigate their fields for one year? Give your answer in both acre-feet and gallons (7.48 gallons = 1 cubic foot)